649143953802 has 24 divisors (see below), whose sum is σ = 1451848844160. Its totient is φ = 209401275240.

The previous prime is 649143953797. The next prime is 649143953839. The reversal of 649143953802 is 208359341946.

649143953802 is a `hidden beast` number, since 64 + 9 + 1 + 43 + 9 + 538 + 0 + 2 = 666.

It is a super-2 number, since 2×649143953802² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 581669652 + ... + 581670767.

It is an arithmetic number, because the mean of its divisors is an integer number (60493701840).

Almost surely, 2^649143953802 is an apocalyptic number.

649143953802 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

649143953802 is an abundant number, since it is smaller than the sum of its proper divisors (802704890358).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649143953802 is a wasteful number, since it uses less digits than its factorization.

649143953802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1163340458 (or 1163340455 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

It can be divided in two parts, 649143 and 953802, that added together give a triangular number (1602945 = T₁₇₉₀).

The spelling of 649143953802 in words is "six hundred forty-nine billion, one hundred forty-three million, nine hundred fifty-three thousand, eight hundred two".